• IT juhtimineOnemar, Ats; Praust, Valdo; Tepandi, Jaak; Perens, Algis1999 https://www.ester.ee/record=b1313380*est
• IT juhtimineOnemar, Ats; Praust, Valdo; Tepandi, Jaak; Perens, Algis1999 https://www.ester.ee/record=b1686763*est